Recommandations?

I want to buy a really good cardio workout dvd but I have absolutely no idea what. Has anyone of you tried a DVD that you can suggest? Something high energy that really makes you sweat...? Preferrably a dance dvd..?

I recommend Jillian Michaels 30 day Shred...it's awesome and you get everything in 25 min-cardio, abs and strength training. It seems like it is the best for ultimate results in the least amount of time-and she kicks your behind in 25 min.